Are bad shots, blown leads at Australian Open ‘choking’?

Andy Murray of Britain reacts after defeating Matteo Berrettini of Italy at the Australian Open tennis championship in Melbourne, Australia, Jan. 17. (AP Photo/Aaron Favila)

MELBOURNE, Australia — When Matteo Berrettini missed what should have been a simple backhand on match point against Andy Murray in the first round of the Australian Open last week, the crowd inside Rod Laver Arena let out a collective gasp of disbelief.